Kaushik Saha

Client: Allyz by Allianz Travel (Insurance SaaS Super-App — US & EU Markets)

• Architected enterprise insurance SaaS super-app with 40+ feature modules across 130+ Gradle modules (Clean Architecture + MVI) covering policy management, claims filing, real-time geo-fenced safety alerts, telemedicine, and emergency assistance for US and EU markets.

• Engineered dual OAuth 2.0 + OIDC authentication (ForgeRock + AWS Cognito) with PKCE, biometric auth via BiometricPrompt, OTP verification, dual-token refresh via OkHttp Authenticator, and AES-256 GCM encrypted token storage in Android KeyStore; maintained roadmap awareness of Passkeys and Play Integrity API.

• Shipped Policy Details V2 (most critical user-facing screen) using custom FlowViewModel with 5+ Flow.combine() operators, merging policy, claims, and coverage streams; built Hospital Finder with FusedLocationProviderClient, Google Maps SDK, Places API autocomplete, and reactive location + permissions state.

• Developed SDK-style WorkManager document vault (S3 uploads, Room state machine, Mutex concurrency, pre-signed URL TTL caching) and claims filing DSL with set-theoretic filter composition and encrypted WebView submission.

• Built multi-module navigation framework (Compose Destinations 2.1 + KSP), 6-type push notification routing with World Aware Geo SDK, integrated Adobe AEP SDK (3-state GDPR model), 11 Room schema migrations, NewRelic instrumentation, and Detekt + Ktlint code quality enforcement.


Client: O2 Germany :

• Built KAPT annotation-processor server-driven UI engine (KotlinPoet, @DynamicWidget/@DynamicAction) enabling no-release UI up dates across 10+ product flavors (O2 Germany, Vodafone Spain, Orange Romania, A1 Austria); achieved 99.5% crash-free rate; deployed as a reusable internal SDK.

• Led KMP shared business logic (Android + iOS) with Redux-inspired BaseStore (State/Intent/Effect), SQLDelight offline persistence, Ktor networking, thread-safe DI; published as internal AAR/KMP artifacts. Built ExoPlayer (Media3) audio/video streaming with MediaLibrary Service, background playback, offline downloads, and MVI-driven paginated playlists.

• Implemented RTL Arabic localization and bidirectional UI for Middle East market delivery — dynamic language switching via KMP PlatformPersistence, key-based remote translation system, and full Compose LocalLayoutDirection RTL compliance across all screens; ensured i18n compliance for Arabic-speaking users.

• Implemented carrier billing + eCommerce flows (WebView JavaScript bridges, OTP/MSISDN/PIN across telecom operators, SQLDelight subscription tracking), 3-strategy dynamic auth (OAuth, SMS Retriever API, server-driven selection, AES-256 GCM KeyStore).

• Developed and scaled boAt Hearables app (1M+ downloads, 2M+ MAU, 4.2-star rating) with a Bluetooth SDK module (BLE/SPP + GATT profiles) supporting real-time data streaming across 15+ device types (earphones, smartwatches, speakers) as an independently versioned, decoupled component.

• Built device diagnostics, hearing diagnostics, equalizer customization, and OTA firmware updates (BLE binary transfer, CRC validation, retry logic) for 2M+ active devices; developed smartwatch health tracking UI (sleep cycle, step count, activity) with Room offline-first persistence; Migrated RxJava to Kotlin Coroutines/Flow.

• Reduced crash rate from 3.5% to 0.8% via Crashlytics triage; cut ANRs by 60% with coroutine/lifecycle management; reduced APK size by 25% (ProGuard/R8); cut deployment time by 50% with GitHub Actions CI/CD + Maven artifact publishing; improved feature adoption by 35% via CleverTap + Firebase GA4 analytics.

• Developed IoT smart-home Android app controlling 20+ device types (lighting, security, HVAC/climate) via Wi-Fi, MQTT, WebSockets, and
Bluetooth with byte-level communication protocols and background Services/BroadcastReceivers for real-time device state management.
• Applied Clean Architecture + MVVM + Hilt DI, achieving 70% unit test coverage (JUnit, Mockito); built multi-language support with respon
sive UI using ConstraintLayout and RecyclerView; gained NFC tag-reading exposure for device pairing.